Duke Nguyen, MD
Gastroenterology Physician · Fountain Valley, CA
Duke Nguyen, MD is a gastroenterology physician with a practice address in Fountain Valley, California, and NPI 1679557797, issued on Dec 1, 2005. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Duke Nguyen
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- Practice location
- 9900 Talbert Ave, Fountain Valley, CA 92708
- Phone
- (714) 378-7390
- Enumerated
- Dec 1, 2005
- Entity
- Type 1 · individual
Also registered at 9900 Talbert Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stanley Arnold, MDInternal Medicine Physician1669403275
- Valery Brouwer, MDPediatrics Physician1508895228
- Shelley Chacon, MDPediatrics Physician1477584985
- Bertram Dias, MDPediatrics Physician1780613406
- Karen Don, MDInternal Medicine Physician1184655698
- Eugene Elliott, M.D.Specialist1205850336
Verify Duke Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
35% fewer Medicare Part D claims than the average gastroenterology physician in 2024
555 Medicare Part D claims for 281 beneficiaries, against an average of 848 among the 13,066 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole94 claims
- Famotidine59 claims
- Gavilyte-G54 claims
- Peg3350-Sod Sul-Nacl-Kcl-Asb-C45 claims
- Sod Sulf-Potass Sulf-Mag Sulf42 claims
- Vemlidy41 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $20,231.38
32 payments, mostly food and beverage; the largest payer was Gilead Sciences, Inc.. The 10,593 providers of this specialty with any payment received $4,948.62 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Gastroenterology Physician providers in California
There are 1,749 gastroenterology physician records in California.
All 1,749 in California → Every provider in Fountain Valley →
Other gastroenterology physician records in California
- David Aarons, MDLodi, CA1619081379
- Constante Abaya, MDOxnard, CA1003918459
- Homan Abdollahzadeh, MDPalm Springs, CA1184634826
- John Abdulian, M.D.Fresno, CA1437114113
- Hussein Abidali, DORancho Cucamonga, CA1205274768
- Alaa Abousaif, MDOrange, CA1235124108
- Donald Abrahm, M.D.Newport Beach, CA1215022405
- Maria Abreu, M.D.West Hollywood, CA1598793374
- Safwat Absood, M.D.Modesto, CA1932113891
- Ronald Adamany, M.D.Mission Viejo, CA1992780688
Common questions
What is Duke Nguyen, MD's NPI number?
Duke Nguyen, MD's National Provider Identifier (NPI) is 1679557797, issued on Dec 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Duke Nguyen, MD located?
The NPPES record lists a practice address at 9900 Talbert Ave, Fountain Valley, CA, 92708. Phone: (714) 378-7390. Providers update this record themselves, so call before visiting.
How can I verify Duke Nguyen, MD's license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Duke Nguyen, MD prescribe under Medicare Part D?
In 2024, Duke Nguyen, MD had 555 Medicare Part D claims for 281 beneficiaries; the average among gastroenterology physician prescribers was 848. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.